Track caller of screensaver "Inhibit"

src/freedesktop_screensaver.rs

@@ -6,6 +6,7 @@ use std::collections::HashMap;
 struct Inhibitor {
     application_name: String,
     reason_for_inhibit: String,
+    client: zbus::names::UniqueName<'static>,
 }
 
 #[derive(Default)]
@@ -16,15 +17,23 @@ pub struct Screensaver {
 
 #[zbus::interface(name = "org.freedesktop.ScreenSaver")]
 impl Screensaver {
-    fn inhibit(&mut self, application_name: String, reason_for_inhibit: String) -> u32 {
+    fn inhibit(
+        &mut self,
+        application_name: String,
+        reason_for_inhibit: String,
+        #[zbus(header)] header: zbus::message::Header<'_>,
+    ) -> u32 {
         self.last_cookie += 1;
+        if let Some(sender) = header.sender() {
             self.inhibitors.insert(
                 self.last_cookie,
                 Inhibitor {
                     application_name,
                     reason_for_inhibit,
+                    client: sender.to_owned(),
                 },
             );
+        }
         self.last_cookie
     }